I had the same problem occurring when using New Tab, i.e. when opening a new tab and entering a URL to visit, one of the following appeared:
Waiting for browser.events.data.msn.com
Waiting for assets.msn.com
Waiting for www.bing.com
I found that by setting the New Tab page to be "about:blank" this issue goes away.
Edge does not support "about:blank" for new tabs by default (thank you Microsoft 😮), so you need to make the following registry updates:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Enrollments\FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF]
"EnrollmentState"=dword:00000001
"EnrollmentType"=dword:00000000
"IsFederated"=dword:00000000
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Provisioning\OMADM\Accounts\FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF]
"Flags"=dword:00d6fb7f
"AcctUId"="0x000000000000000000000000000000000000000000000000000000000000000000000000"
"RoamingCount"=dword:00000000
"SslClientCertReference"="MY;User;0000000000000000000000000000000000000000"
"Handshake"="HL"
"ProtoVer"="1.2"
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge\Recommended]
"NewTabPageLocation"="about:blank"
To apply this:
Close all running Edge Windows
Use notepad to save above to a text file with .reg extension e.g. "about-blank.reg" then launch file from Explorer.